Honey House Silent Wall Clock with Wireless Doorbell (black) The wireless,easy mounting design does not damage wall or door dcor and allows portable use of the receiver,as well as the transmitter. The range is up to 180 meters in an open area. The receiver speaker outputs clear sounds with a choice of melodies. The transmitter has a LED light indicator when activated and is water resistant. The receiver has three signal options,including light signal for users with limited hearing.